Push Notifications - Selective Distribution?

I’d like to use push notifications but it seems that everyone in the family receives them, even though they unique logins.

Is there a way to limit the iOS push notifications to a specific account?

ST is working on it, though not everything, especially all the ST apps aren’t enabled to leverage contacts. See this long thread for details:

Custom SmartApps can be created to leverage the contact list where you can select a recipient. But again not all apps are setup to leverage this.

Enable contacts. Set up your contacts. Use CoRE.